package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.Result;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private  ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper  setmealMapper;
    /*
    * 添加购物车
     */
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        //判断当前加入购物车的产品是否已经存在
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        System.out.println(userId+"000000000000000000");
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //若存在，数量加1，
        if(list != null && list.size() > 0){
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() + 1);
            shoppingCartMapper.update(cart);
        }else{
            // 若不存在，添加到购物车数据库，数量默认为1
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId != null){
                //添加到购物车是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());

                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }else{
                //添加到购物车是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());

                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }
            shoppingCartMapper.insert(shoppingCart);
        }
    }
    /*
    * 查询购物车
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        //获取到当前用户的id
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }
    /*
    * 清空购物车
     */
    @Override
    public void clean() {
        //获取当前用户的id
        Long userId = BaseContext.getCurrentId();
       shoppingCartMapper.clean(userId);
    }
}
